@article{JRAM_1974__0268_0269_151458,
     author = {Makoto Ishida},
     title = {Some unramified abelian extensions of algebraic number fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {165--173},
     publisher = {mathdoc},
     volume = {0268_0269},
     year = {1974},
     zbl = {0295.12004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1974__0268_0269_151458/}
}